Pierre-Paul de Casabianca (13 September 1839 – 12 March 1916) was a French lawyer and Republican politician who was Senator of Corsica from 1885 to 1903.

[1] Casabianca was among the leaders of the Opportunist Republicans who supported Emmanuel Arène in his successful bid in the legislative by-election for the Corte constituency in 1881.

During the reform of the judicial organization, in August 1883 Casabianca's father became president of the Bastia Court of Appeal with two of his cousins as advisers.

[1] In 1893 the Gavini and Casabianca families met in Vichy and made a pact to unite and seize political power from Arène and eliminate him from departmental decision making.

He ran in the legislative elections on 26 April 1914, but retired after being beaten in the first round by Henri Pierangeli(fr).